Doctor for calender rolls



' 1,540,223 o. QUANTE DOCTOR FOR CALENDER ROLLS Filed Aug. 26, 1922 2 sheets-heet 1 June 2, 1925.

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June 2, 1925.

O. QUANTE DOCTOR FOR OALENDER ROLLS Filed Aug. 26 1922 2 Sheets-Sheet 2 v INVENTOR. @m OM-zc A TTORNE Y.

Patented `lune 2., 1.925. l

UNITED sTAIE'sfPATENT orrlca.` I'

. OTTO QUANTE, or PHILADELPHIA, PENNSYLVANIA, AssIGNoE To DILL AND ooLLINs co., OP PHILADELPHIA, PENNSYLVANIA, A CORPORATION or PENNSYLVANIA.

DocToE EoncALENDER ROLLS.

Application led August ,26, 1922.y Serial JNo. 584,394.

To all whom t may concern.' Be it known that I, O'rro QUANTE, a c1t1- zen ofthe United States, and a resident of Philadelphia, in the county of Philadelphia and State -of Pennsylvania, have invented van Improvement in Doctors for Calender Rolls, of which the following is a speciiication.

In the manufacture of paper it is neceslo sarythat the ksurfaces of the calender rolls of calendering machines shall be kept clean and free from small particles of any kind Or character, Otherwise `the pa er which may run through or over such rol s is apt'to be injured, `which may result in serious loss to the manufacturer. j 4

Various forms and constructions of cleaning doctors forA calender rollers heretofore have been constructed `and lemployed but none of themhave been entirely satisfactory in operation. One of the reasons for this has been the'failur'efto provide a structure in `which the portion thereof which is adapted j to-contactv with the surfacevof the roll may r be causedl to properly adjust itself to all portions of the surface thereof even though they may occupyv unequaly distances from the axis thereof. Thepresent invention.v has for its general object to rovide a construction of cleaningv doctorr or calender rolls which although novel is simple in vconstruction and mag be economically manufactured.

v further`object of the invention is to 35 provide a cleaning doctor for calender rolls having improved-and novel means whereby the opposite ends thereof are independently adjustable so that all parts of the portion of the said doctor which is adapted to contact 40 with the surface of the roll may engage said surface, notwithstanding the fact that portions thereof may not be parallel with the axis of the roll.

To these and other ends the invention g5 comprehends the construction and arrangef mentl of parts as will be 'hereinafter fully described in the specification and as illustrated in the drawings forming a part of this specification, and in which one lform of `:o mechanical embodiment of the invention is li shown. However, it will be understood that .the invention is susceptible of embodiment in other forms of construction than that shown and that various changes in the details thereof may be made within the scope of the claims without departing from the said invention. l l

In 4the drawings Fig. 1 is a horizontal sectional view taken on the line 1--1 of Fig.` 2, the said view showing a portion of a calender roll in topv pan. and `also -s'howing the Ldoctor in .top P an; Fig. 2 is a transverse sectional View taken on the line 2-2 of Fig.l; v Fig. 3 is a view simllarlv to that shown in Fig. 2 but with the operative parts of the doctor in different posltion from that shown 'in Fig. 2; j

,'Fig. 4 is a View in rear elevation of a `portion of the doctor at` the right hand end l thereof showing certain details of construction more clearly;

f Fig. 5 is a transverse sectional view taken- ,on the line 5-5of Fig. 4; and

Fig. 6 is a transverse sectional View takenon the vline 6-6 of Fig. 4.

Referring tohe drawin s, 1 designates frame members lof the 'ca ender machine structure situated in front of the opposite c end portions of the calender rollsv 2, one of which yis shown in the drawings. Anchoringor connecting plates 3 arel secured to the inner sides of these framev members 1 by` means of screws 4 and to the said anchorage or connecting members 3 arms 5 are pivotally and swingingly secured or connected by means o'fbolts 8 retained in position by means of nuts 9. Thesaid'bo-lts are provided with extensions 10 upon their inner ends around which are coiled springs 11. One end of each \of these springsextends through a yhole '12 in the extension with which such springs are associated. The opposite ends of the springs are extended as indicated at 15`and contact with headed screws 16 or projections' of any other character upon the inner sides of the arms 5 a considera-blev distance `'from the pivotal axes thereof, 'as shown.- These springs. tend to hold the arms forwardly toward'the calender roll 2in the position as shown in Figs.

1 and 2 .of the drawings. l

The upper ends ofthe arms 5 are pro# vided respectively with inwardly extending portions to which the opposite ends of a plate 21 are secured. For the purpose of effecting connection between the opposite 'ends of said plate and the inwardly extendprovided with relatively wide heads 27 which are adapted to retain the plate 21 in position upon the inwardly extending portions 20 of the arms 5. Directly underneath the relatively wide heads 27 are similar heads -30 'of diameters slightly less than the diameters ofthe openings 23 in the plate 21 in which they are situated, but of greater diameter than the width of the lslots 22. By this arrangement it will be seen that the bolts 25 may be clamped immovably and rigidly to the inward extensions 20 of the arms 5 at any point desired within the slots 22. The heads 30 are of a height or thickness such as to preventthe clamping of the heads 27 tightly against the top surface of the plate 21, hence it will be seen that the latter is pivotally related to the inward extensions 2() of the arni 5. This relationship between these parts permits independent automatic adjustment of the opouter upper edge of the latter.

posite end portions of the plate 2l, which supports and carries thefcleaning portion of the doctor, which will be hereinafter described. An angle member 35, somewhat shorter' than the plate 21, is secured to the The innerv flange of this angle plate extends upwardly and vertically with respect to the plate 21, as is clearly shown in Fig. 6 of the drawings. A cleaning pad 36 of felt or other suitable material ismounted .upon the upper sidei of the plate 21 in front of the upright Ilan e of the angle plate 35. The outer edge o the cleaning pad 36 is ,seated against the inner .side of the said vertical flange. .The said pad projects a considerable distance forwardly of and beyond the inner edge of the plate 21, as shown. For the purpose of securing the\cleaning pad 36 upon the plate 21 I have provided a thin metal strip 37 upon the upper side of the innerjportion of the latter, which is secured in place by means of screws 38. The inner edg'e of the lsaid strip 37 is provided with an upwardly turned serrated ange' forming teeth..v 39` lwhich are ada ted to enter the bottom or under side of t e: pad 36 to aid in holding theI same in place, as clearly indlcated 1n teeth- 41 of which enter and engage the upper portion of the pad, as shown. The outer edge portion of the said plate 40 is secured to a narrow relatively thick plate or bar 42 to which`inger-pieces 43 are secured at intervals. The said finger-pieces are also connected with the outer end portions 'of plate springs 44, the inner lower ends of which are secured to the upright flange of the angle plate 35 by Screws or otherwise as may be desired. For the purpose of pivotally connecting the plate. or bar 42 and the parts carried .fthereby,y including the plate 40, to the 4angle plate 35, I have provided angle brackets 45 arranged in couples, as shown,

springs 44, heretofore referred to, are situated at intervals in order to effect a more satisfactory operation of the plate 40.

It will be noted that the finger-pieces 43, and springs 44, are situated at intervals intermediate the angle brackets 45 and 46 of the respective couples. It will also benoted that the springs 44 have a tendency to straighten out whereby the plate 40 automatically clamps and engages'the pad 36, as shown in the drawings. It will also be apparent that the plate 0r b'ar 42 may be readily actuated by means of the fingerpieces 43 to open the spring-pressed plate 40 to permitthe removal lof a pad from or the insertion of the same into position above the inner portion of the plate 21 and against the innerside ofthe upright or vertical flange of the angle late 35.

For the purpose o retaining the arms 5 in position to hold the-pad 36 out of contact with the roller 2, I have provided arms 50 which arepivotally connected Aat 51`to the arms 5 a distance above the pivotal connection'of the latterto the anchorages -or connections 3. These arms 50 are provided with hooks A52 which are adapted to engage notches 53 in the outer ends of the anchorage or connecting plates 3. The said hooks 52 are -s'hown .in engagement with the notches 53' in Fig. 3 of the drawings.

To limit the outward Swingin ment .ofthe arms 5 lthey are provided, with `I claim and desire to secure contact portions-`54 which contact with stops 55 as shown in Fig. 3 of the drawings.

It will be apparent that by my invention Iv have provided a construction of calender doctor in which the outer end portions thereof are independently and'automatically adjustable with respect to each other, whereby the cleaning pad carried thereby is adapted to adjust itself to the surfaces of the rolls regardless of any inequalities which may be present thereon and regardless of whether or not the portions of surfaces at the oppo-4 site ends of the roll are at unequal distances from the axis of such roll.

Having thus described my invention, what i by Letters Patent is:

l. In a doctor for calender rolls, the combination `of a pad, pivoted arms, and means tically with said arms.

for pivotally and operatively connecting the outer swinging ends of said arms to the said pad, said means being parallel prac- 2. Ina doctor for caleider rol1's,^the combination of la pad, means forl holding the said pad, separate and independent pivoted means, and means for pivotally conecting the said pivoted means to the said holding means, the last named means being practically parallel with the second 4named means.`

3. In a doctor for calender rolls, the com' bination of a cleanin member, means for holding the same, and pivotally supported arms having pivotal connection with the said holding means at the opposite ends thereof, whereby the angulari-ty of said arms with respect to said holding means may be varied.

4. Ina doctor for calender rolls, the combination of a cleaning pad, holding means therefor, pivotally supported arms, |and pivots for 4pivotall connecting t louter swinging ends of said arms to said pad supporting means, said pivots being practically in parallel relation to said arms.

5. In a Adoctor for calender rolls, the combin'ation of a cleaning pad, holding means therefor, armsk supported at their outer flower ends upon stationary pivots, the said arms havin inwardly extending projections at their upper ends upon which the said pad supporting means :is supported, and

meansfor pivotally and adjustably connecting 4the said pad supporting means yto the said inwardly extending p-rpjections.

6. In a doctor for calender rolls, the combination of means for holding a cleaning member, pivoted arms having connection at their outer swinging ends with the" said means` for supporting' the Isaid cleaning member, the said arms being adapted to swing toward and fromwa calender roll, and means for holding-the'fsaid arms and the said supporting means in a osition remote with respect to the said rov bination of a cleaning pad adapted to bear upon the surface of a 'rotating calender roll to clean the same, holding means for the said pad, arms pivotally connected at their outer endsl for supporting lsaid holding means, means for pivotally .connecting the inner swinging ends of said arms to said holding means, andJ yielding means for pressin the said arms toward the said calendelii rol to press the said pad against said ro 8. In a doctorfor 4calender'rolls, the combination of a cleaning pad adapted to bear upon the surfacegof a rotating calender roll to' clean the same,I holding means for the said pad, arms pivotally connected at their outer ends for supporting said holding means, means for ivotally connecting the inner' swinging ends of said'arms to said "holding means, yielding means or pressing the said arms toward the said calender roll to Cpress .the said pad against the said roll, an means having connection with said arms for holding the said arms and the pad carried. thereby out of o erative position with respect to the said ro s. f 9. In a' doctor for calender rolls, the cornbiuation of a pad, a base on which said pad is supported, a spring-pressed clamp -for clamping and securing said pad to said base, parallel arms pivotally supported at their lower outer ends in spaced relation to each other, and means for pivotally connecting the upper inner swinging ends of said-arms to the said base.

10. In a doctor forcalen'der rolls, the combination of a pad which is adapted tol contact with the surface of a calender roll 'to clean the same, a plate upon the top side of which thesaid pad is secured, the iimer edge of which plate is in parallel 'relation to the surface of the adjacent calender roll', `an angle iron supported upon the upper side of the rear edge ortion of said plate, the innerliange of said angle. iron being vertical to'thesaid plate, a clamping plate for clamping the said pad to the said pad supporting plate, means arrangedat intervals for pivotally connecting the said clamping plate to the said anglel iron, springs arranged at intervals for pressing the inner edge poragainst the said pad, arms situated in spaced v relation 'to each other and pivotally supported 'upon stationary pivots at their lower ends, and means for pivotally connecting the upper ends of said arms to the opposite eilid portions of the said pad supporting ate. .l 11. In a doctor for calender rolls, the combination of holdin means for a cleaning pad, arms situate in s aced relation to each other for supporting said holding means, means for connecting the upper ends l 2 of. sald arms to said holding means, connecting plates between said posts and the said arms which plates are provided with .notches in their outer ends, pivots Vfor connecting the lower ends of sald arms `to Said connecting plates, catch arms having pivotal connection with the said arms, the catches upon the said catch arms being adapted to enga-ge the said notches to hold the firstnained arms and vthe cleaning pad carried l0 thereby in inoperative position.`

In testimony that I claim the foregoing 'as my invention, I have hereunto signed my name this 24th day of August, .A..D. 1922. oTTo QUANTE. 7 

